Paul Ogden, a deaf college professor, and his wife Anne, who is hard of hearing, discovered their "ears" in Chelsea, a beautiful, gentle Belgian sheepdog. Instead of herding sheep, like her ancestors, Chelsea works as a signal dog, helping the Ogdens live as normally as possible. She "tells" them if someone is at the door or on the phone, and wakes them when the alarm has gone off. She even reacts to the sound of strange voices and unusual noises. "A warm and witty book . . . Chelsea's tale is a delightful read. . . . That feeling of love and devotion -- the Ogdens for Chelsea and she for...